import java.io.*;
import java.util.*;
public class Example10_16 {
    public static void main(String[] args) {
        File file = new File("student.txt");
        Scanner sc = null;
        int count=0;
        double sum=0;
        try {  double score=0;
            sc = new Scanner(file);
            sc.useDelimiter("[^0123456789.]+");
            while (sc.hasNextDouble()) {
                score = sc.nextDouble();
                count++;
                sum = sum+score;
                System.out.println(score);
            }
            double aver = sum/count;
            System.out.println("平均成绩:"+aver);
        }
        catch (Exception exp) {
            System.out.println(exp);
        }
    }
}
